# CVE-2018-0436: Cisco Webex Teams Information Disclosure and Modification Vulnerability

> Authenticated attackers with admin privileges can view and modify data for other organizations due to insufficient account association checks.

- **Severity:** High 8.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Oct 2018
- **Updated:** 26 Nov 2024
- **Also known as:** GHSA-jr8m-x5pc-vrvr

## What is CVE-2018-0436?

CVE-2018-0436 is a high-severity missing authorization vulnerability in Cisco Webex Teams, published on 5 Oct 2018. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability in Cisco Webex Teams, formerly Cisco Spark, could allow an authenticated, remote attacker to view and modify data for an organization other than their own organization. The vulnerability exists because the affected software performs insufficient checks for associations between user accounts and organization accounts. An attacker who has administrator or compliance officer privileges for one organization account could exploit this vulnerability by using those privileges to view and modify data for another organization account. No customer data was impacted by this vulnerability.

Weakness: CWE-269 (Improper Privilege Management), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2018-0436?

It affects 1 product.


Products: Cisco Webex Teams.

## How do I fix CVE-2018-0436?

No fix has been published for CVE-2018-0436 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-0436 being exploited?

There is no known exploitation of CVE-2018-0436 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Webex Teams

- [CVE-2025-20236](https://insights.sbomify.com/CVE-2025-20236/): Cisco Webex App Client-Side Remote Code Execution Vulnerability (high 8.8)
- [CVE-2018-0387](https://insights.sbomify.com/CVE-2018-0387/): Code injection in Cisco Webex Teams unknown (high 8.8)
- [CVE-2020-3535](https://insights.sbomify.com/CVE-2020-3535/): Cisco Webex Teams Client for Windows DLL Hijacking Vulnerability (high 7.8)
- [CVE-2019-1636](https://insights.sbomify.com/CVE-2019-1636/): Cisco Webex Teams URI Handler Insecure Library Loading Vulnerability (high 7.8)
- [CVE-2019-1939](https://insights.sbomify.com/CVE-2019-1939/): Cisco Webex Teams Logging Feature Command Execution Vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-0436 and fix it if it is affected.

What it is: CVE-2018-0436 is a high-severity missing authorization vulnerability in Cisco Webex Teams, published on 5 Oct 2018. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-0436 in the wild and no public exploit code.

Affected product: Cisco Webex Teams. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2018-0436/ (Markdown: https://insights.sbomify.com/CVE-2018-0436/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-0436
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-0436
- OSV: https://osv.dev/vulnerability/CVE-2018-0436

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-0436/
Summaries are generated and may contain mistakes; the official description above is the record.